I wanted to post something tonight because I haven't posed in a while. Id like to cover "bonding" two T1s together to make one larger pipe. I mean going from 1.54Meg to 3Meg. Who doesn't love more bandwidth? So here is what I did on a Cisco 1841 router.
First, you need to configure the controller interfaces:
controller T1 0/1/0
framing esf
linecode b8zs
channel-group 0 timeslots 1-24
!
controller T1 0/1/1
framing esf
linecode b8zs
channel-group 1 timeslots 1-24
Next, lets configure the Multilink interface. This will be used to put the IP address on:
interface Multilink1
ip address 172.24.0.2 255.255.255.252
ppp multilink
ppp multilink group 1
Next, lets configure the serial interfaces that the T1s will plug into. These will be "bonded" together with the "ppp mulitlink group 1" command.
interface Serial0/1/0:0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 1
!
interface Serial0/1/1:1
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 1
!
Thats it. Now you have 3Meg instead of 1.54Meg. Not too shabby.
